2006 Harley-Davidson FLSTF Fat Boy Technical Analysis & Specification Breakdown
Engineered by Harley-Davidson for the custom - cruiser motorcycle segment, the 2006 Harley-Davidson FLSTF Fat Boy relies on a 1442.2 cc (88 cu in) air-cooled v2, four-stroke powerplant. In factory specification, maximum torque reaches 115.3 Nm (85 lb-ft) at 3,000 rpm, transferring power to the rear wheel through a 5-speed gearbox and belt final drive. Internal engine geometry specifies a bore and stroke of 95.3 x 101.6 mm (3.8 x 4.0 inches) with a 8.9:1 compression ratio.
On the scales, the FLSTF Fat Boy measures 323.9 kg (714 lbs) wet (curb). Rider ergonomics and chassis geometry center around a 1,638 mm (64.5 in) wheelbase engineered for planted straight-line stability. The 18.92-liter (5 US gal) fuel tank paired with a rated consumption of 5.22 L/100 km provides an estimated theoretical range of roughly 362 km (225 miles) between fill-ups.
Within MotoLibrary's Harley-Davidson archive, this model family spans 7 indexed model years from 1999 to 2011, allowing buyers to track year-over-year changes in emissions tuning, weight and equipment.
Theoretical Range
~362 km (225 mi)
Engine
Displacement1442.2 ccm (88.00 cubic inches)
Engine TypeV2, four-stroke
Engine DetailsV2, four-stroke
Torque115.3 Nm (11.8 kgf-m or 85.0 ft.lbs) @ 3000 RPM
Compression8.9:1
Bore x Stroke95.3 x 101.6 mm (3.8 x 4.0 inches)
Fuel SystemCarburettor
Fuel ControlDouble Overhead Cams/Twin Cam (DOHC)
CoolingAir
Transmission
Gearbox5-speed
Final DriveBelt (final drive)
ClutchMulti-plate with diaphragm spring in oil bath
Performance
Fuel Consumption5.22 litres/100 km (19.2 km/l or 45.06 mpg)
Greenhouse Gases121.1 CO2 g/km. (CO2 - Carbon dioxide emission)
ExhaustChrome, over/under shotgun with shorty duals
Chassis
Wheelbase1638 mm (64.5 inches)
Ground Clearance130 mm (5.1 inches)
Wheels & Brakes
Front TyreMT90-B16
Rear Tyre150/80-B16
Front BrakesSingle disc
Rear BrakesSingle disc
Dimensions & Weight
Dry Weight309.8 kg (683.0 pounds)
Weight incl.323.9 kg (714.0 pounds)
Overall Length2395 mm (94.3 inches)
Fuel Capacity18.92 litres (5.00 US gallons)
Other
Color OptionsVivid black, brilliant silver, black pearl, deep cobalt, glacier white pearl, yellow pearl, brandy wine sunglo, two-tone chopper blue and brilliant silver, two-tone black cherry and black pearl, two-tone fire red pearl and vivid black, two-tone deep cobal
Use this page to compare this motorcycle by its real specifications, not only by model name. Focus on the details that affect fit, comfort, handling, range and ownership.
Torque
Torque is useful for judging real-world pull, especially for touring, commuting and loaded riding.
Weight
Compare weight carefully because it affects low-speed handling, parking and confidence.
Fuel Capacity
Fuel capacity helps estimate touring range and how often you may need to stop.
Brakes
Brake setup is worth comparing if you ride in traffic, mountains or with a passenger.
Transmission
Transmission and final drive affect maintenance, smoothness and everyday usability.
